| 摘要 |
PURPOSE:To output the starting signal of a collision safety apparatus such as an air bag apparatus accurately without time delay from the occurrence of collision. CONSTITUTION:Acceleration signals G outputted from an acceleration sensor are integrated with an integrating means 14 of a collision estimating logic 10 for the first period t1 and differentiated with a band-pass filter 17. When the integrated value DELTAVb exceeds a reference value DELTAV1 and the average value dG/dt of the differentiated values during the first period t1 exceeds a reference value DELTAG, a starting signal S is outputted through an AND gate 16 because the large secondary collision speed is estimated. Meanwhile, the acceleration signals G are integrated for the second period t2, which is longer than the above described first period t1 in an integrating means 12 in a collision judging logic 9. When the integrated value DELTAVa exceeds a reference value DELTAV0, the starting signal is outputted regardless of the output of the collision estimating logic 10. |
